harrington



(No Model.) 2 Sheets-Sheet 2.

J. HARRINGTON.

VELOGIPEDE. No. 324,317.- Patented Aug 11, 1885.

' Fi l5- Q i w Cv a} a w 0 INVENTUR:

N. PETERS, Pnawmvo n h'r, Wuhinm D C the extra rider.

UNITED STATES PATENT OFFICE.

JOHN HARRINGTON, OF COVENTRY, ENGLAND.

VELOCIPEDE.

SPECIFICATION forming part of Letters Patent No. 324,317, dated August11, 1885.

Application filed March 27, 1885.

wheel placed in front of the driving-wheels into a tandem velocipede tocarry two riders.

In carrying outmy invention I attach to the frame of a tricycle, at anyconvenient place, a trailing-frame carrying an auxiliary wheel, pedalcrank-axle, saddle, and handle-bar for This frame is provided with bothatransverse and a vertical joint, the former to allow the auxiliaryframeto rise and fall with the inequalities of the road and the latterto allow it to trail as a caster-wheel, so that when the machine moveson a curve it will follow in such a manner as to resist any tendency tooverturn the machine.

The power exerted by the extra rider may be transmitted from the pedalcrank-axle, which he drives either to the wheel of the trailing-frame orto the axle carrying the driving wheels of the tricycle. In somemachines, es-

. )eciall in sidecared ones the former arrangement is preferable; but inothers, more especially in central-geared machines, the latter is mostconvenient.

If the extra rider, through inability or otherwise, cannot assist in thepropulsion of the machine, I provide a rest or platform for his feet,instead of the pedal crank-axle.

It will be seen that by attaching this trailing-frame to any tricycle itwill be converted into a tandem velocipede, while if the machine isspecially built as a tandem it can be arranged for either the rear orthe front part to be detachable, so that the machine in its single formmay be either a front steerer or a double front-steering loosebaektricycle of the Humber type.

In the accompanying drawings, Figure 1 is a side elevation of aside-geared tricycle fitted with my auxiliary frame. Fig. 2 is a plan(No model.) Patented in England December 29, 1889, No. 6,217.

thereof. Fig. 3 is a detail view on a larger scale, showing a sideelevation of the transverse and vertical joints. Fig. 4. is anotherdetail view showing a plan of the transverse joint and the method ofconnecting the auxiliary frame to the frame of the tricycle. 5 is a sideelevation of a central-geared velocipede fitted with my auxiliary frame.Fig. 6 is a plan thereof. Fig. 7 is a detail view on a larger scale,showing a side elevation of the transverse and vertical joints. Fig. 8is another detail view showing a plan of the transverse joint and themethod of connecting the auxiliary frame to the frame of the tricycle.

Throughout the figures similar parts are marked with like letters ofreference.

Referring to these figures, A designates the general frame of thetricycle, to which the auxiliary frame is attached. As the constructionof this part of the machine presents nothing nov'Lo'r new, I will merelyenumerate such important parts of it as are necessary to de scribe myinvention. a a are the drivingwheels; a, the axle thereof; a, the smallsteering-wheel; a the pedal crank-axle; a, the seat or saddle; a thesteering-handle; a the driving-gear, and a the bearings of thedrivingaxle.

The auxiliary frame is designated by the letter B. This frame carries awheel, 0, a pedal crank-axle, D. a seat or saddle, E, and a handle-bar,F. The frame B is provided at some convenient part with a transversejoint or hinge, b, to allow it to rise and fall with the inequalities ofthe road, and a vertical joint, b, preferably in the form of what isknown in the cycling tradeas a head, to allow the frame, or the part ofit carrying the wheel 0, to trail as a caster-wheel, and so run in anycourse in which the tricycle is driven, the steering being under controlof the rider of the tricycle.

In applying theauxiliary frame B to sidegeared tricycles, as shownbyFigs. 1 and 2, the driving-power has to be transmitted from the pedalcrank-axle D to the wheel 0, as it is neither convenient nor in somemachines possible to mount a chain-wheel on the center of thedriving-axle a so as to be connected with the chain-wheel on the pedalcrank-axle D'by Fig.

a drivingchain; but in applying the auxiliary frame B to central-gearedtricycles which have their driving-gear mounted on the center of theaxle, as shown by Figs. 5 and. 6, the driving-power can be convenientlyand is preferably transmitted from the pedal crank-axleD to thedriving-axle a. In the former arrangement, as shown by Figs. 1 and 2,the pedal crank-axle D is mounted 011 the same part of the auxiliaryframe 13 as the wheel 0, and the vertical joint 6 is placed between itand the frame A of the tricycle; but in the latter arrangement thevertical joint I) is placed between the part of the frame B carrying thepedal crank-axle D and the part carrying the wheel 0.

In attaching the auxiliary frame B to the frame A of the tricycle it isdesirable that the transverse joint I) should be as near to the centerof the axle a as possible, so that if the pedal crank-axle I) isconnected with the axle a, as shown by Figs. 5 and 6, the driving-chainmay not be tightened or slackened as the frame rises and falls with theinequalities of the road. In side-geared machines the most convenientpart to attach the auxiliary frame to is the transverse tube of theframe, as shown in enlarged views by Figs. Sand .2. Two slings, :v 00,are clamped or otherwise fixed to the tube of the frame A, and to themare hinged, by pins 3 1 the forked ends I) of the frame B. These pins 33 form the fulcrum of the transverse joint I), and also afford a readymeans of detaching the auxiliary frame. In centralgeared machines thetwo bearings are placed in close proximity to the driving-gear toprevent the axle sagging when excessive power is exerted, and to form aconvenient fulcrum for the auxiliary frame 13 to be mounted on, as shownin enlarged views by Figs. 7 and S. The cases of the bearings (t a ofthe drivingaxle a are extended as sleeves, so as to form fulcrum-pins 731, on which are mounted loosely, so as to form the transverse joint orhinge 1), two clips, I), attached to the auxiliary frame B. The clips b"are preferably hinged at one side and drawn together by a nut and boltat the other, so as to form a ready means of attachment and detachment.By fitting one or two of these auxiliary frames to a sociable or doubletricycle a sociable tandem velocipede will be formed for either three orfour riders.

I am aware that prior to my invention extra parts have been fitted toordinary single tricycles for thepurpose of converting them into tandemtricyoles, and I therefore donot claim such a combination, broadly; but

\Vhat I do claim as my invention, and desire to secure by LettersPatent, is-

The combination, with a front-steering tricycle or velocipede, of anauxiliary frame coupled thereto and provided with an extra wheel, apedal crank-axle, a seat or saddle for the rider, and a handle-bar,substantially as described, the said auxiliary frame having both atransverse and a vertical joint or hinge, whereby the frame is allowedto rise and fall with the inequalities of the ground and to trail as acaster, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

JOHN IIARRIN RTON.

